Display device

ABSTRACT

A display device include a light-emitting panel having first to third light-emitting diodes and a color panel on the light-emitting panel. The color panel includes first to third color areas that transmit light of different colors and a light-blocking area. The light-emitting panel includes two first power lines spaced apart from each other, connecting electrodes electrically connected to the two first power lines, and an insulating layer on the connecting electrodes, the insulating layer having openings each of which exposing a respective one of the connecting electrodes. The first light-emitting diode, the second light-emitting diode, and the third light-emitting diode are spaced apart from one another between the two first power lines. The second color area is smaller than each of the first color area and the third color area in size. The second color area is disposed between the first color area and the third color area.

CROSS-REFERENCE TO RELATED APPLICATION

This application claims priority under 35 U.S.C. § 119 to Korean PatentApplication No. 10-2019-0124771, filed on Oct. 8, 2019, in the KoreanIntellectual Property Office, the disclosure of which is incorporated byreference herein in its entirety.

BACKGROUND 1. Field

The present invention relates to a display device. More particularly,the present invention relates to a display device having different colorareas.

2. Description of Related Art

As a display field for visually expressing various electrical signalinformation has rapidly developed, various display devices havingexcellent characteristics such as a small thickness, light weight, andlow power consumption, etc. have been introduced.

Display devices may include a liquid crystal display device, in whichlight is emitted from a backlight without emitting light by itself, or alight-emitting display device including a display element that may emitlight. A light-emitting display device may include a pixel electrode, anopposite electrode, and display elements including an emission layerbetween the pixel electrode and the opposite electrode.

SUMMARY

One or more exemplary embodiments include a display device, and moreparticularly, a structure of a light-emitting display device.

Additional aspects will be set forth in part in the description whichfollows and, in part, will be apparent from the description, or may belearned by practice of the presented embodiments of the disclosure.

According to an exemplary embodiment of the present invention, a displaydevice include a light-emitting panel having a first light-emittingdiode, a second light-emitting diode, and a third light-emitting diode,and a color panel on the light-emitting panel. The color panel includesa first color area, a second color area, a third color area, and alight-blocking area. The first color area, the second color area, andthe third color area transmit light of different colors. Thelight-emitting panel includes two first power lines spaced apart fromeach other, connecting electrodes electrically connected to the twofirst power lines, and an insulating layer on the connecting electrodes,the insulating layer having openings each of which exposing a respectiveone of the connecting electrodes. The first light-emitting diode, thesecond light-emitting diode, and the third light-emitting diode arespaced apart from one another between the two first power lines. Thesecond color area is smaller than each of the first color area and thethird color area in size. The second color area is disposed between thefirst color area and the third color area.

According to an exemplary embodiment of the present invention, a displaydevice includes two first power lines spaced apart from each other,connecting electrodes overlapping the two first power lines, aninsulating layer disposed on the connecting electrodes and includingopenings respectively exposing the connecting electrodes, and a firstlight-emitting diode, a second light-emitting diode, and a thirdlight-emitting diode between the two neighboring first power lines. Thefirst light-emitting diode, the second light-emitting diode, and thethird light-emitting diode are spaced apart from one another between thetwo first power lines.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other aspects, features, and advantages of certainexemplary embodiments of the disclosure will be more apparent from thefollowing description taken in conjunction with the accompanyingdrawings, in which:

FIG. 1A is a perspective view of a display device according to anexemplary embodiment of the present invention;

FIG. 1B is a plan view showing an enlarged view of a display area in adisplay device according to an exemplary embodiment of the presentinvention;

FIG. 2A is a plan view of a color panel according to an exemplaryembodiment of the present invention;

FIG. 2B is a cross-sectional view of a color panel according to anexemplary embodiment of the present invention;

FIG. 3 is a diagram showing each of portions in a colorconversion-transmission layer according to an exemplary embodiment ofthe present invention;

FIG. 4A is a plan view of a display panel according to an exemplaryembodiment of the present invention;

FIG. 4B is a cross-sectional view of a display panel according to anexemplary embodiment of the present invention;

FIG. 5 is a cross-sectional view of a display device according to anexemplary embodiment of the present invention;

FIG. 6 is a circuit diagram of a pixel circuit connected to alight-emitting diode in a display device according to an exemplaryembodiment of the present invention;

FIG. 7 is a plan view of a pixel circuit and lines on a light-emittingpanel in a display device according to an exemplary embodiment of thepresent invention;

FIG. 8 is a plan view of organic light-emitting diodes overlapping thepixel circuit and lines of FIG. 7 according to an exemplary embodimentof the present invention;

FIG. 9 is a cross-sectional view taken along line Ix-IX′ of FIG. 8according to an exemplary embodiment of the present invention;

FIG. 10 is a cross-sectional view taken along line x-X′ of FIG. 8according to an exemplary embodiment of the present invention;

FIG. 11 is a cross-sectional view taken along line XI-XI′ of FIG. 8according to an exemplary embodiment of the present invention;

FIG. 12 is a plan view partially showing a display device according toan exemplary embodiment of the present invention;

FIG. 13 is a plan view partially showing a display device according toan exemplary embodiment of the present invention; and

FIGS. 14 and 15 are diagrams of an electronic device including a displaydevice according to an exemplary embodiment of the present invention.

DETAILED DESCRIPTION OF EXEMPLAY EMBODIMENTS

Reference will now be made in detail to embodiments, examples of whichare illustrated in the accompanying drawings, wherein like referencenumerals refer to like elements throughout. In this regard, the presentembodiments may have different forms and should not be construed asbeing limited to the descriptions set forth herein. Accordingly, theembodiments are merely described below, by referring to the figures, toexplain aspects of the present description. As used herein, the term“and/or” includes any and all combinations of one or more of theassociated listed items.

Throughout the disclosure, the expression “at least one of a, b and c”indicates only a, only b, only c, both a and b, both a and c, both b andc, all of a, b, and c, or variations thereof.

The example embodiments will be described below in more detail withreference to the accompanying drawings. Those components that are thesame or are in correspondence are rendered the same reference numeralregardless of the figure number, and redundant explanations are omitted.

While such terms as “first,” “second,” etc., may be used to describevarious components, such components are not be limited to the aboveterms. The above terms are used only to distinguish one component fromanother.

An expression used in the singular encompasses the expression of theplural, unless it has a clearly different meaning in the context.

In the present specification, it is to be understood that the terms“including,” “having,” and “comprising” are intended to indicate theexistence of the features, numbers, steps, actions, components, parts,or combinations thereof disclosed in the specification, and are notintended to preclude the possibility that one or more other features,numbers, steps, actions, components, parts, or combinations thereof mayexist or may be added.

It will be understood that when a layer, region, or component isreferred to as being “formed on” another layer, region, or component, itmay be directly or indirectly formed on the other layer, region, orcomponent. That is, for example, intervening layers, regions, orcomponents may be present. Sizes of components in the drawings may beexaggerated for convenience of explanation.

In other words, since sizes and thicknesses of components in thedrawings are arbitrarily illustrated for convenience of explanation, thefollowing embodiments are not limited thereto. When a certain embodimentmay be implemented differently, a specific process order may beperformed differently from the described order.

For example, two consecutively described processes may be performedsubstantially at the same time or performed in an order opposite to thedescribed order. In the embodiments below, when layers, areas, orelements or the like are referred to as being “connected,” it will beunderstood that they may be directly connected or an intervening portionmay be present between layers, areas or elements.

For example, when layers, areas, or elements or the like are referred toas being “electrically connected,” they may be directly electricallyconnected, or layers, areas or elements may be indirectly electricallyconnected and an intervening portion may be present.

FIG. 1A is a perspective view of a display device 1 according to anexemplary embodiment, and FIG. 1B is a plan view showing a partiallyenlarged view of a display area DA in the display device 1 according tothe exemplary embodiment. Referring to FIG. 1A, the display device 1 mayinclude a display area DA emitting light and a non-display area NDA notemitting light. The non-display area NDA is adjacent to the display areaDA and may surround (e.g., entirely surround) the display area DA. In anexemplary embodiment, the display area DA may have a rectangular shapehaving longer sides in ±x-directions.

Alternatively, the display area DA may have a rectangular shape havinglonger sides in ±y-directions, a square shape, or a polygonal shape. Thedisplay device 1 may provide a predetermined image via light emittedfrom a plurality of pixel areas PA in the display area DA. In thisregard, FIG. 1B shows first to third pixel areas PA1, PA2, and PA3arranged in the x-direction and the y-direction. The first to thirdpixel areas PA1, PA2, and PA3 may emit light of different colors fromone another. In an exemplary embodiment, the first pixel area PA1 may bea red pixel area emitting red light, the second pixel area PA2 may be ablue pixel area emitting blue light, and the third pixel area PA3 may bea green pixel area emitting green light.

The first to third pixel areas PA1, PA2, and PA3 may be surrounded bynon-pixel areas NPA therebetween.

The display device 1 may include a light-emitting panel 20 and a colorpanel 10 stacked in a thickness direction (z-direction) of the displaydevice 1.

FIG. 2A is a plan view of the color panel 10 according to theembodiment, and FIG. 2B is a cross-sectional view of the color panel 10taken along line II-II′ of FIG. 2A. Referring to FIGS. 2A and 2B, thecolor panel 10 may include first to third color areas R, B and G thatmay emit light of various colors and a light-blocking area BAsurrounding the first to third color areas R, B, and G. The first tothird color areas R, B, and G may pass the light and are surrounded bythe light-blocking area BA.

The light-blocking area BA may block the light and may be configured asa mesh type among the first to third color areas R, B, and G.

The first to third color areas R, B, and G may be substantially the sameas the first to third pixel areas PA1, PA2, and PA3 described above withreference to FIG. 1B, and the light-blocking area BA may besubstantially the same as the non-pixel area NPA described above withreference to FIG. 1B. In an exemplary embodiment, the first to thirdcolor areas R, B, and G may be substantially the same, with respect toarea and shape, as the first to third pixel areas PA1, PA2, and PA3 asdescribed above with reference to FIG. 1B, and the light-blocking areaBA may be substantially the same, with respect to area and shape, as thenon-pixel area NPA described above with reference to FIG. 1B. In anexemplary embodiment, the first to third color areas R, B, and G mayoverlap the first to third pixel areas PA1, PA2, and PA3, and thelight-blocking area BA may overlap the non-pixel area NPA. The first tothird color areas R, B, and G may be distinguished according to lightemitted therefrom.

For example, the first color area R (see FIG. 2A) may emit first colorlight Lr (see FIG. 2B), the second color area B (see FIG. 2A) may emitsecond color light Lb (see FIG. 2B), and the third color area G (seeFIG. 2A) may emit third color light Lg (see FIG. 2B). The first colorlight Lr may denote red light, the second color light Lb may denote bluelight, and the third color light Lg may denote green light. The redlight may have a peak wavelength of about 580 nm to about 750 nm. Thegreen light may have a peak wavelength of about 495 nm to about 580 nm.

The blue light may have a peak wavelength of about 400 nm to about 495nm. Incident light Lib may be second color light and may change thecolor thereof or transmit while passing through the first to third colorareas R, B, and G.

Therefore, the first to third color light Lr, Lb, and Lg may be emittedfrom the color panel 10. The color panel 10 may include a firstsubstrate 110, a light-blocking layer 120, a color layer 130, and acolor conversion-transmission layer 140, as shown in FIG. 2B. The firstsubstrate 110 is a light-transmitting substrate and may include atransparent glass material or a transparent resin material. The firstsubstrate 110 may include a transparent glass substrate mainly includingSiO₂. In an exemplary embodiment, the first substrate 110 may include apolymer resin.

The polymer resin may include polyethersulfone, polyacrylate, polyetherimide, polyethylene naphthalate, polyethylene terephthalate,polyphenylene sulfide, polyarylate, polyimide, polycarbonate, cellulosetri-acetate, cellulose acetate propionate, etc. The light-blocking layer120 may include a first light-blocking layer 121 and a secondlight-blocking layer 122. The first light-blocking layer 121 is disposedunder the color layer 130 and the second light-blocking layer 122 may beon the color layer 130.

FIG. 2B shows that the light-blocking layer 120 includes the firstlight-blocking layer 121 and the second light-blocking layer 122, but inan exemplary embodiment, one of the first light-blocking layer 121 andthe second light-blocking layer 122 may be omitted. The firstlight-blocking layer 121 and the second light-blocking layer 122 mayhave various colors, e.g., black or white, black or blue, etc. Forexample, one of the first light-blocking layer 121 and the secondlight-blocking layer 122 (e.g., second light-blocking layer 122) may beblack, and the other (e.g., first light-blocking layer 121) may be whiteor blue. Alternatively, the first light-blocking layer 121 and thesecond light-blocking layer 122 may have the same color as each other.The first light-blocking layer 121 and/or the second light-blockinglayer 122 may include an opaque inorganic insulating material such aschromium oxide or molybdenum oxide, or an opaque insulating materialsuch as a black resin. The first light-blocking layer 121 and/or thesecond light-blocking layer 122 may include an organic insulatingmaterial such as a white resin, a blue resin, etc.

In an exemplary embodiment, when the first light-blocking layer 121includes an organic insulating material of blue color, the firstlight-blocking layer 121 may include the same material as that of asecond color filter 130 b in the color layer 130 and may be manufacturedtogether with the second color filter 130 b when the second color filter130 b is manufactured. The color layer 130 may include a pattern of anorganic material including a pigment or a dye. The color layer 130 mayinclude a color filter in each of pixel areas.

The color layer 130 may include a first color filter 130 a in the firstpixel area PA1, the second color filter 130 b in the second pixel areaPA2, and a third color filter 130 c in the third pixel area PA3. Thefirst color filter 130 a may include a first color (e.g., red) pigmentor dye on the first substrate 110. The first color filter 130 a may beobtained by forming a first photosensitive color layer including thefirst color pigment or dye and patterning the first photosensitive colorlayer. The second color filter 130 b may include a second color (e.g.,blue) pigment or dye on the first substrate 110. The second color filter130 b may be obtained by forming a second photosensitive color layerincluding the second color (e.g., blue) pigment or dye and patterningthe second photosensitive color layer. The third color filter 130 c mayinclude a third color (e.g., green) pigment or dye on the firstsubstrate 110.

The third color filter 130 c may be obtained by forming a thirdphotosensitive color layer including the third color pigment or dye andpatterning the third photosensitive color layer. The colorconversion-transmission layer 140 may be on the color layer 130. Thecolor conversion-transmission layer 140 may include a color conversionportion or a transmission portion in each of the pixel areas PA1 to PA3.

The color conversion-transmission layer 140 may include a first colorconversion portion 140 a in the first pixel area PA1 (or first colorarea R, FIG. 2A), a transmission portion 140 b in the second pixel areaPA2 (or second color area B, FIG. 2A), and a second color conversionportion 140 c in the third pixel area PA3 (or third color area G, FIG.2A). The first color conversion portion 140 a overlaps the first colorfilter 130 a in the first pixel area PA1 to convert the incident lightLib into the first color light Lr.

The first color conversion portion 140 a may include first quantum dotsthat are excited by the incident light Lib to emit the first color lightLr having a longer wavelength than that of the incident light Lib. Thetransmission portion 140 b may overlap the second color filter 130 b inthe second pixel area PA2 and may transmit the incident light Lib. Thus,the second color light Lb may be emitted through the transmissionportion 140 b and the second color filter 130 b. The second color lightLb is blue light having a peak wavelength within the same wavelengthrange as that of the incident light Lib.

The transmission portion 140 b may include scattering particles forincreasing an optical efficiency. The second color conversion portion140 c overlaps the third color filter 130 c in the third pixel area PA3to convert the incident light Lib into the third color light Lg.

The second color conversion portion 140 c may include second quantumdots that are excited by the incident light Lib to emit the second colorlight Lg having a longer wavelength than that of the incident light Lib.

The first color conversion portion 140 a, the transmission portion 140b, and the second color conversion portion 140 c may be respectivelyformed by an inkjet printing method within concave spaces defined by thelight-blocking layer 120, e.g., the second light-blocking layer 122. Abarrier layer may be under and/or over the color conversion-transmissionlayer 140.

In this regard, FIG. 2B shows that a first barrier layer 170 is underthe color conversion-transmission layer 140 and a second barrier layer180 is on the color conversion-transmission layer 140. For example, eachof the first color conversion portion 140 a, the transmission portion140 b and the second color conversion portion 140 c may be disposedbetween the first barrier layer 170 and the second barrier layer 180.The first barrier layer 170 and the second barrier layer 180 may includean inorganic insulating material, e.g., silicon nitride, silicon oxide,or silicon oxynitride.

FIG. 2B shows both the first barrier layer 170 and the second barrierlayer 180, but in an exemplary embodiment, one of the first barrierlayer 170 and the second barrier layer 180 may be omitted. An overcoatlayer 190 may be on the second barrier layer 180. The overcoat layer 190may include an organic material such as a resin, and the organicmaterial may be transparent. An upper surface of the overcoat layer 190,e.g., a second surface opposite a first surface facing the colorconversion-transmission layer 140, may be flat.

FIG. 2B shows that the color panel 10 includes the overcoat layer 190,but in an exemplary embodiment, the overcoat layer 190 may be omitted.

FIG. 3 is a diagram showing each of portions in the colorconversion-transmission layer 140 according to an exemplary embodiment.Referring to FIG. 3, the first color conversion portion 140 a convertsthe blue incident light Lib to the first color light Lr.

The first color conversion portion 140 a may include a firstphotosensitive polymer 151 in which first quantum dots 152 and firstscattering particles 153 are dispersed. The first quantum dots 152 areexcited by the blue incident light Lib and may isotropically emit thefirst color light Lr having a longer wavelength than that of blueincident light Lib. The first photosensitive polymer 151 may include anorganic material transmitting light. The first scattering particles 153scatter the blue incident light Lib that is not absorbed by the firstquantum dots 152 to make more first quantum dots 152 excited, and thusmay increase a color conversion ratio of the first color conversionportion 140 a. The first scattering particles 153 may include, forexample, titanium oxide (TiO₂) or metal particles.

The first quantum dots 152 may be selected from a Group II-VI compound,a Group III-V compound, a Group IV-VI compound, a Group IV element, aGroup IV compound, and a combination thereof. The second colorconversion portion 140 c converts the blue incident light Lib into thethird color light Lg.

The second color conversion portion 140 c may include a secondphotosensitive polymer 161 in which second quantum dots 162 and secondscattering particles 163 are dispersed. The second quantum dots 162 areexcited by the blue incident light Lib and may isotropically emit thethird color light Lg having a longer wavelength than that of the blueincident light Lib. The second photosensitive polymer 161 includes anorganic material transmitting light and may include the same material asthat of the first photosensitive polymer 151. The second scatteringparticles 163 scatter the blue incident light Lib that is not absorbedby the second quantum dots 162 to make more second quantum dots 162excited, and thus may increase a color conversion ratio of the secondcolor conversion portion 140 c. The second scattering particles 163 mayinclude, for example, titanium oxide (TiO₂) or metal particles, and mayinclude the same material as that of the first scattering particles 153.The second quantum dots 162 may be selected from a Group II-VI compound,a Group III-V compound, a Group IV-VI compound, a Group IV element, aGroup IV compound, and a combination thereof.

The second quantum dots 162 may include the same material as that of thefirst quantum dots 152, and sizes of the second quantum dots 162 may beless than those of the first quantum dots 152. The transmission portion140 b may transmit the blue incident light Lib. The transmission portion140 b may include a third photosensitive polymer 171 in which thirdscattering particles 173 are dispersed. The third photosensitive polymer171 may include, for example, an organic material transmitting light,such as a silicon resin, an epoxy resin, etc., and may include the samematerial as that of the first and second photosensitive polymers 151 and161.

The third scattering particles 173 may scatter and emit the blueincident light Lib and may include the same material as those of thefirst and second scattering particles 153 and 163.

FIG. 4A is a plan view of a display panel according to the embodiment,and FIG. 4B is a cross-sectional view of the display panel taken alongline IV-IV′ of FIG. 4A. Referring to FIGS. 4A and 4B, the light-emittingpanel 20 may include light-emitting elements, e.g., first to thirdorganic light-emitting diodes OLED1, OLED2, and OLED3 in the x-directionand the y-direction.

The first to third organic light-emitting diodes OLED1, OLED2, and OLED3may respectively correspond to the first to third pixel areas PA1, PA2,and PA3 (see FIG. 1B) described above with reference to FIG. 1B.Referring to FIG. 4B, the light-emitting panel 20 may include a secondsubstrate 210. The second substrate 210 may include a glass material, ametal material, an organic material, etc.

For example, the second substrate 210 may include a glass materialmainly containing SiO₂, or various flexible or bendable materials, e.g.,a polymer resin. A pixel circuit layer 220 may be on the secondsubstrate 210.

The pixel circuit layer 220 may include first to third pixel circuits220 a, 220 b, and 220 c, and each of the first to third pixel circuits220 a, 220 b, and 220 c may include a plurality of electronic elements,e.g., transistors and at least one capacitor. The first to third pixelcircuits 220 a, 220 b, and 220 c may be electrically connected to thefirst to third organic light-emitting diodes OLED1, OLED2, and OLED3,respectively. The first organic light-emitting diode OLED1 may include afirst pixel electrode 241 a, an intermediate layer 243, and an oppositeelectrode 245 that are sequentially stacked.

The second organic light-emitting diode OLED2 may include a second pixelelectrode 241 b, the intermediate layer 243, and the opposite electrode245 that are sequentially stacked, and the third organic light-emittingdiode OLED3 may include a third pixel electrode 241 c, the intermediatelayer 243, and the opposite electrode 245 that are sequentially stacked.The first to third pixel electrodes 241 a, 241 b, and 241 c may bespaced apart from one another. Edges of each of the first to third pixelelectrodes 241 a, 241 b, and 241 c may be covered by a sixth insulatinglayer 230. The sixth insulating layer 230 may include a plurality ofopenings respectively overlapping or exposing the first to third pixelelectrodes 241 a, 241 b, and 241 c, and the first to third pixelelectrodes 241 a, 241 b, and 241 c may each overlap the intermediatelayer 243 and the opposite electrode 245 thereon via the openings. Inthis regard, FIG. 4B shows that first openings 231 of the sixthinsulating layer 230 respectively overlap or expose the first to thirdpixel electrodes 241 a, 241 b, and 241 c. The first openings 231 of thesixth insulating layer 230 may respectively define emission areas.

For example, the first openings 231 of the sixth insulating layer 230respectively define a first emission area EA1, a second emission areaEA2, and a third emission area EA3. The intermediate layer 243 includesan emission layer. The emission layer may include an organic material.For example, the emission layer may include a low-molecular weightorganic material or a polymer organic material. The emission layer mayinclude a low-molecular weight or polymer organic material emitting bluelight.

The intermediate layer 243 may further include one or more functionallayers selected from a hole transport layer (HTL), a hole injectionlayer (HIL), an electron transport layer (ETL), and an electroninjection layer (EIL), in addition to the emission layer. Theintermediate layer 243, e.g., the emission layer and at least onefunctional layer, may be integrally provided on the second substrate210.

The opposite electrode 245 may include a transparent electrode or asemi-transparent electrode. An encapsulation layer 250 may be over (ordisposed on) the second substrate 210 to cover the first to thirdorganic light-emitting diodes OLED1, OLED2, and OLED3. The encapsulationlayer 250 may include at least one inorganic encapsulation layer and atleast one organic encapsulation layer.

In an exemplary embodiment, the encapsulation layer 250 may have astructure, in which a first inorganic encapsulation layer, an organicencapsulation layer, and a second inorganic encapsulation layer aresequentially stacked. The first to third organic light-emitting diodesOLED1, OLED2, and OLED3 may respectively emit the same color light,e.g., blue light Lb.

The blue light Lb emitted from the first to third organic light-emittingdiodes OLED1, OLED2, and OLED3 may correspond to the incident light Libdescribed above with reference to FIG. 2B.

The blue light Lb emitted from the first to third organic light-emittingdiodes OLED1, OLED2, and OLED3 may be incident on the color panel 10 asthe incident light Lib and pass through the color panel 10 describedabove. The color panel 10 may convert the incident light Lib to thefirst color light Lr or the third color light Lg or transmit theincident light Lib as the second color light Lb according to whichportion of the color panel 10 the incident light Lib is incident on.

FIG. 5 is a cross-sectional view of a display device 1 according to anexemplary embodiment. Referring to FIG. 5, the display device 1 mayinclude the light-emitting panel 20 and the color panel 10 arranged in alight-emitting direction of the light-emitting panel 20, e.g., over thelight-emitting panel 20. An intermediate layer 260 may be between thelight-emitting panel 20 and the color panel 10.

The intermediate layer 260 may include an organic material.

Detailed examples of the light-emitting panel 20 and the color panel 10are described above with reference to FIGS. 2A to 4B. The blue light Lbemitted from the first organic light-emitting diode OLED1 of thelight-emitting panel 20 is incident on the first color conversionportion 140 a of the color panel 10, and may be converted into the redlight Lr by the first color conversion portion 140 a.

Color purity of the red light Lr may further increase after the redlight Lr passes through the first color filter 130 a. The blue light Lbemitted from the second organic light-emitting diode OLED2 of thelight-emitting panel 20 may sequentially pass through the transmissionportion 140 b of the color panel 10 and the second color filter 130 b. Astack structure of the transmission portion 140 b and the second colorfilter 130 b does not include quantum dots, and thus the blue light Lbincident on the stack structure of the transmission portion 140 b andthe second color filter 130 b does not convert into another color.

The blue light Lb passing through the transmission portion 140 b and thesecond color filter 130 b is emitted away from the display device 1. Theblue light Lb emitted from the third organic light-emitting diode OLED3of the light-emitting panel 20 is incident on the second colorconversion portion 140 c of the color panel 10 and may be converted intogreen light Lg in the second color conversion portion 140 c.

Color purity of the green light Lg may further increase after the greenlight Lb passes through the third color filter 130 c. A width of thefirst emission area EA1 of the light-emitting panel 20 may be equal to,less than, or greater than a width of the first color area of the colorpanel 10 of FIG. 2B. Here, the width of the first color area may be awidth of an area defined by the light-blocking layer 120 and may besubstantially equal to a width of the first pixel area PA1. A width ofthe second emission area EA2 of the light-emitting panel 20 may be equalto, less than, or greater than a width of the second color area of thecolor panel 10 of FIG. 2B. For example, the width of the second colorarea may be a width of an area defined by the light-blocking layer 120and may be substantially equal to a width of the second pixel area PA2.A width of the third emission area EA3 of the light-emitting panel 20may be equal to, less than, or greater than a width of a third colorarea of the color panel 10.

For example, the width of the third color area may be a width of an areadefined by the light-blocking layer 120 and may be substantially equalto a width of the third pixel area PA3.

FIG. 6 is a circuit diagram of a pixel circuit 220 n connected to alight-emitting diode in the display device according to an exemplaryembodiment. Referring to FIG. 6, a pixel electrode of an organiclight-emitting diode OLED is connected to the pixel circuit 220 n and anopposite electrode of the organic light-emitting diode OLED may beconnected to a common power voltage ELVSS. The organic light-emittingdiode OLED may emit light of a predetermined luminance according to anelectric current supplied from the pixel circuit 220 n.

The organic light-emitting diode OLED of FIG. 6 may correspond to eachof the first to third organic light-emitting diodes OLED1, OLED2, andOLED3 described above with reference to FIG. 5. The pixel circuit 220 nmay control an amount of the electric current flowing from a powervoltage ELVDD to the common power voltage ELVSS via the organiclight-emitting diode OLED in response to a data signal.

The pixel circuit 220 n may include a driving transistor M1, a switchingtransistor M2, a sensing transistor M3, and a storage capacitor Cst.Each of the driving transistor M1, the switching transistor M2, and thesensing transistor M3 may be an oxide semiconductor thin film transistorincluding an active layer including an oxide semiconductor, or a siliconsemiconductor thin film transistor including an active layer includingpolysilicon.

Each of the driving transistor M1, the switching transistor M2, and thesensing transistor M3 may include first and second electrodes which aredifferent from a gate electrode. According to a type of the transistor,the first electrode may be one of a source electrode and a drainelectrode and the second electrode may be the other. The first electrodeof the driving transistor M1 may be connected to a driving power voltageline VDL that supplies the driving power voltage ELVDD, and the secondelectrode of the driving transistor M1 may be connected to a pixelelectrode of the organic light-emitting diode OLED. A gate electrode ofthe driving transistor M1 may be connected to a first node N1.

The driving transistor M1 may control an amount of the electric currentflowing from the driving power voltage ELVDD to the organiclight-emitting diode OLED in response to a voltage of the first node N1.A first electrode of the switching transistor M2 is connected to a dataline DL, and a second electrode may be connected to the first node N1. Agate electrode of the switching transistor M2 may be connected to a scanline SL.

The switching transistor M2 is turned on when a scan signal is suppliedto the scan line SL to electrically connect the data line DL to thefirst node N1. A first electrode of the sensing transistor M3 may beconnected to the second electrode of the driving transistor M1, and asecond electrode of the sensing transistor M3 may be connected to asensing line SENL. A gate electrode of the sensing transistor M3 may beconnected to a control line CL. The sensing transistor M3 is turned onwhen a control signal is supplied to the control line CL to electricallyconnect the sensing line SENL to the second electrode of the drivingtransistor M1.

The sensing transistor M3 may sense characteristic information of thedriving transistor M1. The storage capacitor Cst is connected betweenthe first node N1 and the second electrode of the driving transistor M1to store the voltage of the first node N1.

A first electrode of the storage capacitor Cst may be connected to thegate electrode of the driving transistor M1, and a second electrode ofthe storage capacitor Cst may be connected to the second electrode ofthe driving transistor M1. FIG. 6 shows the driving transistor M1, theswitching transistor M2, and the sensing transistor M3 as N-typeMetal-Oxide-Semiconductor (NMOS) transistors, but one or more exemplaryembodiments are not limited thereto.

For example, at least one of the driving transistor M1, the switchingtransistor M2, and the sensing transistor M3 may be a P-typeMetal-Oxide-Semiconductor (PMOS) transistor. FIG. 6 shows that the pixelcircuit 220 n includes three transistors, but one or more exemplaryembodiments are not limited thereto.

For example, the pixel circuit 220 n may include four or moretransistors.

FIG. 7 is a plan view of a pixel circuit, power lines and signal lineson a light-emitting panel of a display device according to an exemplaryembodiment, FIG. 8 is a plan view of organic light-emitting diodesoverlapping the pixel circuit, power lines and signal lines of FIG. 7,and FIG. 9 is a cross-sectional view taken along line IX-IX′ of FIG. 8.Referring to FIG. 7, first power lines (hereinafter, referred to ascommon power voltage lines VSL) may extend in a first direction (e.g.,±y direction). The common power voltage lines VSL may be spaced apartfrom each other in a second direction (e.g., ±x-direction) intersectingwith the first direction. A plurality of data lines, e.g., first tothird data lines DL1, DL2, and DL3, a second power line (hereinafter,referred to as a driving power voltage line VDL), and the sensing lineSENL may be between neighboring common power voltage lines VSL. Thefirst to third data lines DL1, DL2, and DL3, the driving power voltageline VDL, and the sensing line SENL may extend in the first direction.

The first to third data lines DL1, DL2, and DL3 may be spaced apart fromone another in the second direction and may be adjacent to one of thetwo common power voltage lines VSL, between the two common power voltagelines VSL. One or more auxiliary lines may be provided in a directionintersecting with the common power voltage lines VSL and the drivingpower voltage line VDL, e.g., in the second direction (±x-direction). Inan exemplary embodiment, FIG. 7 shows a first auxiliary line AL1 and asecond auxiliary line AL2. The first auxiliary line AL1 and the secondauxiliary line AL2 may be spaced apart from each other. For example, thefirst auxiliary line AL1 may be adjacent to the scan line SL and thesecond auxiliary line AL2 may be adjacent to the control line CL. One ofthe first auxiliary line AL1 and the second auxiliary line AL2 may beelectrically connected to the common power voltage line VSL, and theother may be electrically connected to the driving power voltage lineVDL. Since the first auxiliary line AL1 and/or the second auxiliary lineAL2 are electrically connected to the common power voltage line VSL orthe driving power voltage line VDL, a line applying the common powervoltage ELVSS or the driving power voltage ELVDD may have a meshstructure having a grating shape. The mesh structure may prevent drop ofthe voltage applied via the common power voltage line VSL or the drivingpower voltage line VDL. In an exemplary embodiment, FIG. 7 shows astructure in which the first auxiliary line AL1 is electricallyconnected to the common power voltage line VSL and the second auxiliaryline AL2 is electrically connected to the driving power voltage lineVDL.

For example, the second auxiliary line AL2 may be electrically connectedto the driving power voltage line VDL via a twentieth contact hole CT20and an electrical connection between the first auxiliary line AL1 andthe common power voltage line VSL will be described below with referenceto FIG. 10.

Each of the scan line SL and the control line CL may extend in thesecond direction (±x-direction) intersecting with the first direction,and a plurality of electronic elements, e.g., transistors and storagecapacitors, may be between the scan line SL and the control line CL. Asshown in FIGS. 7 and 8, a plurality of pixel electrodes, e.g., the firstpixel electrode 241 a, the second pixel electrode 241 b, and the thirdpixel electrode 241 c, may be between the neighboring common powervoltage lines VSL. The first to third pixel electrodes 241 a, 241 b, and241 c may respectively correspond to different pixel areas.

The first pixel electrode 241 a may be the pixel electrode of the firstorganic light-emitting diode OLED1, the second pixel electrode 241 b maybe the pixel electrode of the second organic light-emitting diode OLED2,and the third pixel electrode 241 c may be the pixel electrode of thethird organic light-emitting diode OLED3.

The first pixel electrode 241 a may be connected to the pixel circuit.In this regard, FIGS. 7 and 8 show that the first pixel electrode 241 ais electrically connected to a first driving transistor M11, a secondswitching transistor M12, a first sensing transistor M13, and a firststorage capacitor Cst1. The first driving transistor M11 may include afirst active layer A1 and a first gate electrode G1. The first activelayer A1 may include a first high-concentration impurity region B1 and asecond high-concentration impurity region C1, and a first channel regionmay be between the first high-concentration impurity region B1 and thesecond high-concentration impurity region C1. The firsthigh-concentration impurity region B1 and the second high-concentrationimpurity region C1 may be doped with impurities of higher concentrationthan that of the first channel region.

The first gate electrode G1 may overlap the first channel region of thefirst active layer A1. One of the first high-concentration impurityregion B1 and the second high-concentration impurity region C1 of thefirst active layer A1 may be connected to the driving power voltage lineVDL and the other may be connected to the first storage capacitor Cst1.For example, the first high-concentration impurity region B1 may beconnected to a first electrode CE1 of the first storage capacitor Cst1via a first contact hole CT1 and the second high-concentration impurityregion C1 may be connected to the driving power voltage line VDL via asecond contact hole CT2.

A part of the first electrode of the first storage capacitor Cst1, whichis connected to the first high-concentration impurity region B1, and apart of the driving power voltage line VDL, which is connected to thesecond high-concentration impurity region C1, may respectivelycorrespond to the second electrode and the first electrode of thedriving transistor M1 described above with reference to FIG. 6. Thefirst switching transistor M12 may include a second active layer A2 anda second gate electrode G2. The second active layer A2 may include afirst high-concentration impurity region B2 and a secondhigh-concentration impurity region C2, and a second channel region maybe between the first high-concentration impurity region B2 and thesecond high-concentration impurity region C2. The second gate electrodeG2 may overlap the second channel region of the second active layer A2.

The second gate electrode G2 may be a part of the scan line SL. The scanline SL extending in the second direction (±x-direction) may include afirst extension portion SL-P extending from a side of the scan line SLin the first direction (±y-direction), and a part of the first extensionportion SL-P may correspond to the second gate electrode G2.

The first extension portion SL-P may be adjacent to a first data lineDL1. One of the first high-concentration impurity region B2 and thesecond high-concentration impurity region C2 of the second active layerA2 may be connected to the first data line DL and the other may beconnected to the first storage capacitor Cst1 via a connection metal NM.

For example, the first high-concentration impurity region B2 may beconnected to the connection metal NM via a third contact hole CT3 andthe second high-concentration impurity region C2 may be connected to thefirst data line DL1 via a fourth contact hole CT4. The first sensingtransistor M13 may include a third active layer A3 and a third gateelectrode G3. The third active layer A3 may include a firsthigh-concentration impurity region B3 and a second high-concentrationimpurity region C3, and a third channel region may be between the firsthigh-concentration impurity region B3 and the second high-concentrationimpurity region C3.

The third gate electrode G3 may overlap the third channel region of thethird active layer A3. The third gate electrode G3 may be a part of thecontrol line CL. The control line CL extending in the second direction(±x-direction) may include a second extension portion CL-P extendingfrom a side of the control line CL in the first direction(±y-direction), and a part of the second extension portion CL-P may bethe third gate electrode G3.

The second extension portion CL-P may extend between the sensing lineSENL and the driving power voltage line VDL. One of the firsthigh-concentration impurity region B3 and the second high-concentrationimpurity region C3 of the third active layer A3 may be connected to thesensing line SENL and the other may be connected to the first storagecapacitor Cst1.

For example, the first high-concentration impurity region B3 may beconnected to the sensing line SENL via a sixth contact hole CT6 and thesecond high-concentration impurity region C3 may be electricallyconnected to the first electrode of the first storage capacitor Cst1 viaa seventh contact hole CT7. The first storage capacitor Cst1 may includeat least two electrodes. In an exemplary embodiment, FIG. 7 shows thatthe first storage capacitor Cst1 includes a first electrode CE1, asecond electrode CE2, and a third electrode CE3. The first to thirdelectrodes CE1, CE2, and CE3 may overlap one another. The first storagecapacitor Cst1 (e.g., the first electrode CE1, the second electrode CE2,and the third electrode CE3) may be between the driving power voltageline VDL and the first data line DL1 in a plan view.

The first electrode CE1, the second electrode CE2, and the thirdelectrode CE3 may be respectively connected to different elements fromone another. Referring to FIG. 9, the first electrode CE1, the secondelectrode CE2, and the third electrode CE3 may be disposed over a secondsubstrate 210.

The first electrode CE1 may be disposed over the second electrode CE2,and the second electrode CE2 may be disposed over the third electrodeCE3. The third electrode CE3 may be directly on an upper surface of thesecond substrate 210. The third electrode CE3 may include metal, e.g.,molybdenum (Mo), copper (Cu), aluminum (Al), titanium (Ti), etc., andmay have a single-layered or multi-layered structure including the abovestated material. A portion of the third electrode CE3 may be directlyunder the first active layer A1 of the first driving transistor M11 tooverlap the first active layer A1.

A first insulating layer IL1 may be disposed on the third electrode CE3.The first insulating layer IL1 may include an inorganic insulatingmaterial such as silicon nitride, silicon oxide, and/or siliconoxynitride. The first active layer A1 may be on the first insulatinglayer IL1. FIG. 9 shows the first active layer A1, but the second activelayer A2 and the third active layer A3 described above with reference toFIG. 7 may be on the first insulating layer IL1 like the first activelayer A1. A second insulating layer IL2 may be on the first active layerA1. The second insulating layer IL2 may include an inorganic insulatingmaterial such as silicon nitride, silicon oxide, and/or siliconoxynitride. In an exemplary embodiment, the first active layer A1 may beinterposed between a portion of the first insulating layer IL1 and aportion of the second insulating layer IL2.

The second electrode CE2 may be on the second insulating layer IL2. Thesecond electrode CE2 may include metal, e.g., molybdenum (Mo), copper(Cu), aluminum (Al), titanium (Ti), etc., and may have a single-layeredor multi-layered structure including the above stated material. A firstportion of the second electrode CE2 may correspond to the first gateelectrode G1 as described above. A second portion of the secondelectrode CE2 may be connected to the connection metal NM via a fifthcontact hole CT5 in a third insulating layer IL3. The second electrodeCE2 may be covered by the third insulating layer IL3. The thirdinsulating layer IL3 may include an inorganic insulating material suchas silicon nitride, silicon oxide, or silicon oxynitride.

The first electrode CE1 may be disposed on the third insulating layerIL3. In an exemplary embodiment, the first electrode CE1 may include amulti-electrode including a plurality of sub-layers that are on andunder an insulating layer and connected to each other via a contact holein the insulating layer. For example, FIG. 9 illustrates that the firstelectrode CE1 includes a first sub-layer CE11 and a second sub-layerCE12 respectively on and under a fourth insulating layer IL4. The firstsub-layer CE11 and the second sub-layer CE12 may include metal, e.g.,molybdenum (Mo), copper (Cu), aluminum (Al), titanium (Ti), etc., andmay have a single-layered or multi-layered structure including the abovestated material. The first sub-layer CE11 and the second sub-layer CE12may be connected to each other via an eighth contact hole CT8 in thefourth insulating layer IL4. In an exemplary embodiment, the firstelectrode CE1 may include one of the first sub-layer CE11 and the secondsub-layer CE12. For example, the first electrode CE1 may be formed ofthe first sub-layer CE11 only or the second sub-layer CE12 only.

The first electrode CE1 may have the same voltage level as that of thethird electrode CE3. For example, the first electrode CE1 may beconnected to the third electrode CE3 via a contact hole that penetratesthrough at least one insulating layer between the first electrode CE1and the third electrode CE3. For example, FIG. 9 shows that the firstelectrode CE1 is connected to the third electrode CE3 via a ninthcontact hole CT9 that penetrates through the first to third insulatinglayers IL1, IL2, and IL3.

Since a capacitance of the first storage capacitor Cst1 is based on asum of a capacitance between the first electrode CE1 and the secondelectrode CE2 and a capacitance between the second electrode CE2 and thethird electrode CE3, the capacitance of the first storage capacitor Cst1may increase as compared with a case in which two electrodes areprovided.

The driving power voltage line VDL may have a dual-line structure. Thedriving power voltage line VDL may include a first sub-driving powervoltage line VDL1 and a second sub-driving power voltage line VDL2 onand under the fourth insulating layer IL4, respectively. The firstsub-driving power voltage line VDL1 may be connected to the secondsub-driving power voltage line VDL2 via a twelfth contact hole CT12 (seeFIG. 7) that penetrate through the fourth insulating layer IL4. Thefourth insulating layer IL4 may include an inorganic insulating materialand/or an organic insulating material.

Similarly, the sensing line SENL may have a dual-line structure. Thesensing line SENL may include a first sub-sensing line SENL1 and asecond sub-sensing line SENL2 on and under the fourth insulating layerIL4, respectively. The first sub-sensing line SENL1 and the secondsub-sensing line SENL2 may be connected to each other via an eleventhcontact hole CT11 (see FIG. 7) that penetrates through the fourthinsulating layer IL4.

Although not shown in FIG. 9, each of the first to third data lines DL1,DL2, and DL3 described above with reference to FIG. 7 may have adual-line structure, in which dual lines are connected to each other viaa contact hole in the fourth insulating layer IL4.

A fifth insulating layer IL5 may be disposed on the first electrode CE1,the driving power voltage line VDL, and the sensing line SENL that areon the same layer (e.g., the third insulating layer IL3). The fifthinsulating layer IL5 may include an inorganic insulating material and/oran organic insulating material. The organic insulating material mayinclude an organic material such as acryl, benzocyclobutene (BCB),polyimide, (hexamethyldisiloxane (HMDSO), etc.

The first pixel electrode 241 a may be on the fifth insulating layer IL5and may be electrically connected to an electronic element, e.g., thefirst storage capacitor Cst1, of the pixel circuit via the twelfthcontact hole CT12 in the fifth insulating layer IL5. FIG. 9 illustratesthat the first pixel electrode 241 a is connected to a part of anelectronic element, e.g., the first electrode CE1 of the first storagecapacitor Cst1. Similarly, the second pixel electrode 241 b is also onthe fifth insulating layer IL5, and although not shown in FIG. 9, thethird pixel electrode 241 c (see FIG. 8) may be on the fifth insulatinglayer IL5.

The sixth insulating layer 230 is disposed on the first pixel electrode241 a and may include a first opening 231 exposing the first pixelelectrode 241 a. The intermediate layer 243 and the opposite electrode245 may be on the first pixel electrode 241 a that is exposed throughthe first opening 231. The first pixel electrode 241 a, the intermediatelayer 243, and the opposite electrode 245 that are sequentially stackedmay form the first organic light-emitting diode OLED1. The first opening231 of the sixth insulating layer 230 may define the firstlight-emitting area EA1 of the first organic light-emitting diode OLED1.

Structures of the first organic light-emitting diode OLED1 and the pixelcircuit connected to the first organic light-emitting diode OLED1described above with reference to FIGS. 7 to 9 may also be applied tothe second and third organic light-emitting diodes OLED2 and OLED3 andpixel circuits connected to the second and third organic light-emittingdiodes OLED2 and OLED3. Referring to FIGS. 7 and 8, the second pixelelectrode 241 b of the second organic light-emitting diode OLED2 may beelectrically connected to a second driving transistor M21, a secondswitching transistor M22, a second sensing transistor M23, and a secondstorage capacitor Cst2. Similarly, the third pixel electrode 241 c ofthe third organic light-emitting diode OLED3 may be electricallyconnected to a third driving transistor M31, a third switchingtransistor M32, a sensing transistor M33, and a third storage capacitorCst3.

Structures of the second driving transistor M21, the second switchingtransistor M22, the second sensing transistor M23, and the secondstorage capacitor Cst2 are similar to those of the first drivingtransistor M11, the first switching transistor M12, the first sensingtransistor M13, and the first storage capacitor Cst1, and thusdescriptions thereof are omitted. Structures of the third drivingtransistor M31, the third switching transistor M32, the third sensingtransistor M33, and the third storage capacitor Cst3 are similar tothose of the first driving transistor M11, the first switchingtransistor M12, the first sensing transistor M13, and the first storagecapacitor Cst1, and thus descriptions thereof are omitted.

Like the first storage capacitor Cst1 and the first pixel electrode 241a being connected to each other via a tenth contact hole CT10 defined inthe fifth insulating layer IL5 (see FIG. 9), the second storagecapacitor Cst2 and the second pixel electrode 241 b may be connected toeach other via a nineteenth contact hole CT19 defined in the fifthinsulating layer IL5. The third storage capacitor Cst3 and the thirdpixel electrode 241 c may be connected to each other via an eighteenthcontact hole CT18 defined in the fifth insulating layer. The tenthcontact hole CT10 corresponds to a connection point (first connectionpoint) between the first storage capacitor Cst1 and the first pixelelectrode 241 a, the nineteenth contact hole CT19 corresponds to aconnection point (second connection point) between the second storagecapacitor Cst2 and the second pixel electrode 241 b, and the eighteenthcontact hole CT18 corresponds to a connection point between the thirdstorage capacitor Cst3 and the third pixel electrode 241 c.

The first to third storage capacitors Cst1, Cst2, and Cst3 are locatedbetween two neighboring common power voltage lines VSL and may bearranged in one direction (a direction in which the common power voltagelines extend, e.g., y-direction).

The second pixel electrode 241 b overlaps some parts of the first tothird storage capacitors Cst1, Cst2, and Cst3, and thus may have alength (a length in the first direction, L2) that is relatively lessthan those of the other pixel electrodes for the connection between oneof the first and third storage capacitors Cst1 and Cst3 and the pixelelectrode electrically connected thereto. For example, the length L2 ofthe second pixel electrode 241 b in the first direction may be less thanlengths L1 and L3 of the first and third pixel electrodes 241 a and 241c in the first direction. The present inventive concept is not limitedthereto. In an exemplary embodiment, one of the first to third pixelelectrodes 241 a, 241 b and 241 c may have a length smaller than anotherone of the first to third pixel electrodes 241 a, 241 b and 241 c. Theeighteenth contact hole CT18, that is, the connection point between thethird storage capacitor Cst3 and the third pixel electrode 241 c, may belocated between a first virtual line VL1 passing through one side edgeof the second pixel electrode 241 b and a second virtual line VL2passing through one side edge of the third pixel electrode 241 c.

FIG. 10 is a cross-sectional view taken along line X-X′ of FIG. 8, andFIG. 11 is a cross-sectional view taken along line XI-XI′ of FIG. 8.

Referring to FIG. 10, the common power voltage line VSL may have adual-line structure. For example, the common power voltage line VSL mayinclude a first sub-common power voltage line VSL1 and a secondsub-common power voltage line VSL2 overlapping each other with thefourth insulating layer IL4 therebetween, similarly to the driving powervoltage line VDL (see FIG. 9) and the sensing line SENL (see FIG. 9)described above with reference to FIGS. 8 and 9. The first sub-commonpower voltage line VSL1 and the second sub-common power voltage lineVSL2 may be electrically connected to each other via a thirteenthcontact hole CT13 that penetrates the fourth insulating layer IL4.

At least one under line (e.g., a signal line) may be disposed under thecommon power voltage line VSL. In an exemplary embodiment, FIG. 10 showsthat a first under line UL1 and a second under line UL2 are under thecommon power voltage line VSL.

The first under line UL1 may be disposed on the same layer (e.g., thesecond insulating layer IL2) as that of the scan line SL (see FIG. 7)and the control line CL (see FIG. 7) and may include the same materialas those of the scan line SL and the control line CL. The second underline UL2 is disposed on the same layer (e.g., the second substrate 210)as that of the third electrode CE3 of the first storage capacitor Cst1(see FIG. 7), and the first and second auxiliary lines AL1 and AL2, andmay include the same material as those of the third electrode CE3 andthe first and second auxiliary lines AL1 and AL2. FIG. 10 shows that thefirst auxiliary line AL1 is disposed on the same layer as that of thesecond under line UL2. As described above with reference to FIGS. 8 and9, the first auxiliary line AL1 may be electrically connected to thecommon power voltage line VSL or the driving power voltage line VDL, andin an exemplary embodiment, FIG. 10 shows that the first auxiliary lineAL1 and the common power voltage line VSL are electrically connected toeach other via a seventeenth contact hole CT17.

The common power voltage line VSL may be connected to the first underline UL1 via a fourteenth contact hole CT14 and may be connected to thesecond under line UL2 via a fifteenth contact hole CT15. The first andsecond under lines UL1 and UL2 may have the same voltage level as thatof the common power voltage line VSL. The first and second under linesUL1 and UL2 may have lengths that are less than that of the common powervoltage line VSL and may be electrically connected to the common powervoltage line VSL and may overlap the common power voltage line VSL. Whenthe display device is a large-sized display device, there may be avoltage drop issue due to a resistance of the common power voltage lineVSL itself. However, as described above, when the common power voltageline VSL has a dual-line structure and/or is connected to the first andsecond under lines UL1 and UL2, the voltage drop caused due to theresistance of the common power voltage line VSL itself may beeffectively prevented.

The common power voltage line VSL may be electrically connected to aconnecting electrode 261 that is disposed on the fifth insulating layerIL5. The connecting electrode 261 is disposed on the same layer (e.g.,the fifth insulating layer IL5) as that of the first pixel electrode 241a (see FIG. 9) and may include the same material as the first pixelelectrode 241 a. The connecting electrode 261 may be connected to thecommon power voltage line VSL via a sixteenth contact hole CT16 thatpenetrates the fifth insulating layer IL5.

The sixth insulating layer 230 may be disposed on the connectingelectrode 261. The sixth insulating layer 230 may include a secondopening 232 that overlaps the connecting electrode 261. The secondopening 232 is distinguished from the first opening 231 described abovewith reference to FIG. 9. The first opening 231 described above withreference to FIG. 9 exposes the electronic element of the pixel circuit,e.g., the first pixel electrode 241 connected to the first storagecapacitor Cst1. However, the second opening 232 exposes the connectingelectrode 261 that is connected to the common power voltage line VSL andmay be provided for electrical connection between the opposite electrode245 and the connecting electrode 261.

The intermediate layer 243 may be disposed on the sixth insulating layer230 and may include a through hole 243 h within the second opening 232.As shown in the enlarged view of FIG. 10, the intermediate layer 243 mayinclude a first functional layer 243A, an emission layer 243B, and asecond functional layer 243C. In this case, the through hole 243 h maypenetrate through the first functional layer 243A, the emission layer243B, and the second functional layer 243C and may be manufactured by alaser drilling process. The opposite electrode 245 on the intermediatelayer 243 may be in direct contact with the connecting electrode 261 viathe through hole 243 h. The first functional layer 243A may include ahole injection layer and/or a hole transport layer, and the secondfunctional layer 243C may include an electron injection layer and/or anelectron transport layer.

The opposite electrode 245 has a relatively large area so as to entirelycover the display area. A region of the opposite electrode 245 may havea resistance which is different from that of another region of theopposite electrode 245 due to a voltage drop of the opposite electrode245 itself. However, since the common power voltage line VSL passingthrough the display area is electrically connected to the oppositeelectrode 245 as in one or more exemplary embodiments, the voltage dropdue to the resistance of the opposite electrode 245 itself may beprevented.

The connecting electrode 261 may overlap the common power voltage lineVSL and may be spaced apart from neighboring connecting electrodes 261.For example, as shown in FIG. 8, one connecting electrode (hereinafter,referred to as a first connecting electrode 261A) may be spaced apartfrom one another connecting electrode (hereinafter, referred to as asecond connecting electrode 261B) in the second direction, and may alsobe spaced apart from the other connecting electrode (hereinafter,referred to as a third connecting electrode 261C) in the firstdirection. Other connecting electrode (hereinafter, referred to as afourth connecting electrode 261D) may be apart from the secondconnecting electrode 261B and the third connecting electrode 261Crespectively in the first and second directions.

Edges of the first to fourth connecting electrodes 261A, 261B, 261C, and261D are covered by the sixth insulating layer 230 (see FIG. 10). Thesixth insulating layer 230 may include the second openings 232 thatrespectively overlap the first to fourth connecting electrodes 261A,261B, 261C, and 261D. For example, the second openings 232 may beprovided to overlap the first to fourth connecting electrodes 261A,261B, 261C, and 261D, respectively. In other words, the second openings232 may be located to overlap the first to fourth connecting electrodes261A, 261B, 261C, and 261D, respectively.

The second openings 232 may expose the connecting electrodes, e.g.,first to fourth connecting electrodes 261A, 261B, 261C, and 261D.However, not all the second openings 232 are used for the electricalconnection between the opposite electrode 245 and the common powervoltage line VSL as shown in FIG. 10.

Referring to FIG. 11, the common power voltage line VSL may be connectedto the first and second under lines UL1 and UL2 as described above withreference to FIG. 10, and may be electrically connected to theconnecting electrode 261, e.g., the second connecting electrode 261B,via the sixteenth contact hole CT16 in the fifth insulating layer IL5.The second connecting electrode 261B is covered by the sixth insulatinglayer 230 and the second opening 232 may expose the second connectingelectrode 261B. The intermediate layer 243 and the opposite electrode245 may be sequentially stacked in the second opening 232 without athrough hole penetrating through the intermediate layer 243, and thus,the opposite electrode 245 may not be in contact with the secondconnecting electrode 261B. In an exemplary embodiment, when theintermediate layer 243 includes a through hole that exposes the secondconnecting electrode 261B and is formed within the second opening 232through a laser drilling process, etc., the opposite electrode 245 maybe in contact with the second connecting electrode 261B via the throughhole and this structure may be the same as the structure described abovewith reference to FIG. 10.

Referring to FIGS. 8, 10, and 11, the first to third organiclight-emitting diodes OLED1, OLED2, and OLED3 that are spaced apart fromone another are disposed between two common power voltage lines VSL, andthe connecting electrodes 261, e.g., the first to fourth connectingelectrodes 261A, 261B, 261C, and 261D may each overlap the two commonpower voltage lines VSL.

The sixth insulating layer 230 may include the second openings 232 thatrespectively overlap the first to fourth connecting electrodes 261A,261B, 261C, and 261D. The second openings 232 are provided for theelectrical connection between the opposite electrode 245 and theconnecting electrode 261, but the electrical connection between theopposite electrode 245 and the common power voltage line VSL via thesecond opening 232 may be selectively made according to whether thelaser drilling process is performed. As described above with referenceto FIGS. 8 to 10, and 11, the opposite electrode 245 and the commonpower voltage line VSL are electrically connected to each other via thesecond opening 232 that exposes the first connecting electrode 261A fromamong the first to fourth connecting electrodes 261A, 261B, 261C, and261D.

In an exemplary embodiment, the opposite electrode 245 and the commonpower voltage line VSL may be electrically connected to each other viaone, two, or more second openings 232, from among the plurality ofsecond openings 232 exposing the first to fourth connecting electrodes261A, 261B, 261C, and 261D.

In FIGS. 8 to 10, the first and second auxiliary lines AL1 and AL2 aredisposed on the same layer as that of the third electrode CE3 andinclude the same material as that of the third electrode CE3, but one ormore exemplary embodiments are not limited thereto. In an exemplaryembodiment, the first and second auxiliary lines AL1 and AL2 may bedisposed on the same layer (e.g., the fifth insulating layer IL5) asthose of the first to third pixel electrodes 241 a, 241 b, and 241 c,and may include the same material as those of the first to third pixelelectrodes 241 a, 241 b, and 241 c. Such arrangement may allow effectiveuse of a space under the first and second auxiliary lines AL1 and AL2.For example, sizes or stack structure of lines, transistors, or storagecapacitor between the second substrate 210 and the first and secondauxiliary lines AL1 and AL2 may be changed. In an exemplary embodiment,an area of the storage capacitor may be relatively greater than that ofFIG. 8 or the scan line SL or the control line CL is configured to havedual or triple line structure, and thus the resistance of scan line SLor the control line CL may be reduced.

FIG. 12 is a plan view partially showing a display device according toan exemplary embodiment. FIG. 12 shows a state in which a color paneloverlaps the light-emitting panel of FIG. 8.

Referring to FIG. 12, the connecting electrodes 261 overlap two commonpower voltage lines VSL that are spaced apart from each other asdescribed above with reference to FIG. 8. For example, the two commonpower voltage lines VSL extending in the first direction are spacedapart from each other in the second direction, and the first to fourthconnecting electrodes 261A, 261B, 261C, and 261D may be spaced apartfrom one another while overlapping one of the two common power voltagelines VSL. The first connecting electrode 261A and the third connectingelectrode 261C are spaced apart from each other in the first directionwhile overlapping the same common power voltage line VSL (e.g., thecommon power voltage line at a right side), and the second connectingelectrode 261B and the fourth connecting electrode 261D may be spacedapart from each other in the first direction while overlapping the samecommon power voltage line VSL (the common power voltage line at a leftside).

The second openings 232 may be provided to overlap each of the first tofourth connecting electrodes 261A, 261B, 261C, and 261D. A first pixelarea PA1, a second pixel area PA2, and a third pixel area PA3 may beprovided in each virtual unit VU connecting the second openings 232. InFIG. 12, the virtual unit VU is defined for the convenience of adescription and may have a square shape and the second openings 232 maybe at four corners.

The first pixel area PA1, the second pixel area PA2, and the third pixelarea PA3 emit light of different colors from one another. The firstpixel area PA1 corresponds to a pixel emitting red light, the secondpixel area PA2 corresponds to a pixel emitting blue light, and the thirdpixel area PA3 corresponds to a pixel emitting green light.

The red light, blue light, and green light emitted from the first tothird pixel areas PA1, PA2, and PA3 are visible to the user, after theblue light emitted from the first to third organic light-emitting diodesis converted into another color or transmitted through the color panelas described above with reference to FIG. 5. Therefore, the first tothird pixel areas PA1, PA2, and PA3 shown in FIG. 12 may respectivelycorrespond to color areas R, B, and G of the color panel. For example,the first pixel area PA1 of FIG. 12 may correspond to a first color area(e.g., a red color area R) of the color panel, and the first color areaR is surrounded by the light-blocking a and corresponds to anoverlapping portion between the first color filter and the first colorconversion portion described above with reference to FIG. 5. The secondpixel area PA2 may correspond to a second color area (e.g., a blue colorarea B) of the color panel and the second color area B may correspond toan overlapping portion between the second color filter and thetransmission portion. The third pixel area PA3 may correspond to a thirdcolor area (e.g., a green color area G) of the color panel and the thirdcolor area G may correspond to an overlapping portion between the thirdcolor filter and the second color conversion portion. The first to thirdpixel areas PA1, PA2, and PA3 of FIG. 12 respectively correspond to thefirst to third color areas R, B, and G surrounded by the light-blockingarea BA. Thus, hereinafter the first to third pixel areas PA1, PA2, andPA3 may respectively denote the first to third color areas R, B, and Gor the first to third color areas R, B, and G may respectively denotethe first to third pixel areas PA1, PA2, and PA3. In an exemplaryembodiment, the second color area B is smaller than each of the firstcolor area R and the third color area G in size, and the second colorarea B is disposed between the first color area R and the third colorarea G. The present inventive concept is not limited thereto. In anexemplary embodiment, one of the first to third color areas R, B and Gmay be smaller than the others in size.

Widths among the neighboring color areas may be constant or the same.For example, a first width W1 between the first color area R and thesecond color area B may be substantially equal to a second width W2between the second color area B and the third color area G. In otherwords, a width of a portion of the light-blocking area BA, between thefirst color area R and the second color area B, may be substantiallyequal to a width of another portion of the light-blocking area BA,between the second color area B and the third color area G.

Similarly, a third width W3 between the first color area R of thevirtual unit VU and a color area adjacent thereto may be substantiallyequal to the first width W1 between the first color area R and thesecond color area B within the virtual unit VU. A fourth width W4between the third color area G of the virtual unit VU and a color areaadjacent thereto may be substantially equal to the second width W2between the second color area B and the third color area G within thevirtual unit VU.

A length L12 of the second color area B in the first direction may beless than a length L11 of the first color area R or a length L13 of thethird color area G in the first direction. For example, the length L12of the second color area B in the first direction may be less than eachof the length L11 of the first color area R and the length L13 of thethird color area G in the first direction. The second color area B maybe located middle among the first to third color areas R, B, and G inthe virtual unit VU. The present inventive concept is not limitedthereto. In an exemplary embodiment, a color area in one of the first tothird light-emitting diodes OLED1, OLED2 and OLED3 has a first length inthe first direction, and the first length is less than a length of acolor area in another one of the first to third light-emitting diodesOLED1, OLED2 and OLED3. As shown in FIG. 8, since the first to thirdstorage capacitors Cst1, Cst2, and Cst3 are arranged in the firstdirection, one of the first to third color areas R, G, and G, e.g., thesecond color area B, may overlap the first to third storage capacitorsCst1, Cst2, and Cst3. Here, the second color area B may have arelatively smaller length L12 in the first direction for the electricalconnection between the third pixel electrode 241 c and the third storagecapacitor Cst3 of the third organic light-emitting diode OLED3 (see FIG.8) overlapping the third color area G. For example, an eighteenthcontact hole CT18 for the electrical connection between the third pixelelectrode 241 c and the third storage capacitor Cst3 may be disposedbetween a third virtual line VL3 passing through one side edge of thesecond color area B and a fourth virtual line VL4 passing through oneside edge of the third color area G. The third virtual line VL3 and thefourth virtual line VL4 may be respectively different from the firstvirtual line VL1 and the second virtual line VL2 of FIG. 8.

Each of the first to third color areas R, B, and G may at leastpartially overlap each of the first to third organic light-emittingdiodes OLED1, OLED2, and OLED3, and a connection point between each ofthe first to third organic light-emitting diodes OLED1, OLED2, and OLED3and an electronic element of the pixel circuit thereof may be covered bythe light-blocking area BA. For example, the tenth contact hole CT10 forconnecting the first storage capacitor Cst1 to the first pixel electrode241 a, the nineteenth contact hole CT19 for connecting the secondstorage capacitor Cst2 to the second pixel electrode 24 b, and theeighteenth contact hole CT18 for connecting the third storage capacitorCst3 to the third pixel electrode 241 c may be covered by thelight-blocking area BA, e.g., the light-blocking layer of the colorpanel.

FIG. 13 is a plan view partially showing a display device according toan exemplary embodiment.

Referring to FIG. 13, the plurality of common power voltage lines VSLmay be spaced apart from one another in the display area DA of thedisplay device, and the second openings 232 of the sixth insulatinglayer 230 may be spaced apart from one another and may expose the commonpower voltage lines VSL. The display area DA may have a structure inwhich the virtual units VU, each of which connects four adjacent secondopenings 232, are repeatedly located, as described above with referenceto FIG. 12.

As described above with reference to FIGS. 8, 10, and 11, the secondopenings 232 are provided for the electrical connection between theopposite electrode and the common power voltage line VSL, but theelectrical connection between the opposite electrode and the commonpower voltage line VSL via the second openings 232 may vary depending onwhether there is the through hole in the intermediate layer 243 (seeFIG. 10) in the second opening 232. For example, the through hole may beformed within some of the second openings 232 and may not be formedwithin the others.

In an exemplary embodiment, as shown in FIG. 13, the electricalconnection point between the opposite electrode and the common powervoltage line VSL, e.g., the overlapping structure between the secondopening 232 of the sixth insulating layer and the through hole 243 h inthe intermediate layer, may be located at each of four corners of avirtual square surrounding M×N virtual units. Here, M and N each are 1or greater natural number, and M and N may have the same value as eachother or different values from each other. From among the plurality ofsecond openings 232 included in M×N virtual units VU, the secondopenings 232 in which the through hole 243 h of the intermediate layeris not provided may correspond to a kind of dummy connecting structure.

FIGS. 14 and 15 are diagrams of an electronic device including thedisplay device 1 according to an exemplary embodiment.

Referring to FIGS. 14 and 15, the display device 1 may be included in anelectronic device such as a television or a monitor, or an electronicdevice such as a laptop. Alternatively, the display device 1 may be usedin various electronic devices, e.g., a smart frame or a large billboard.

The display device 1 may be not only used in an electronic deviceincluding a rectangular screen having a longer transverse side. Forexample, the display device 1 may be used in an electronic device havinga rectangular screen that is longer in a longitudinal direction.

According to one or more exemplary embodiments, the display device mayprevent degradation of displaying quality caused due to a voltage dropof the opposite electrode in a large-sized display device. Also, sincethe display device includes color elements that are arranged to have apredetermined rule, the processes of manufacturing the color conversionportion included in the color panel may be effectively performed, andthe display elements and the pixel circuits electrically connected tothe display elements may be arranged effective within a limited space.In addition, a sufficient capacitance of the storage capacitor may beensured.

It should be understood that exemplary embodiments described hereinshould be considered in a descriptive sense only and not for purposes oflimitation. Descriptions of features or aspects within each exemplaryembodiment should typically be considered as available for other similarfeatures or aspects in other exemplary embodiments. While one or moreexemplary embodiments have been described with reference to the figures,it will be understood by those of ordinary skill in the art that variouschanges in form and details may be made therein without departing fromthe spirit and scope as defined by the following claims.

What is claimed is:
 1. A display device comprising: a light-emittingpanel comprising a first light-emitting diode, a second light-emittingdiode, and a third light-emitting diode; and a color panel disposed onthe light-emitting panel, the color panel comprising a first color area,a second color area, a third color area, and a light-blocking area,wherein the first color area, the second color area, and the third colorarea transmit light of different colors, wherein the light-emittingpanel comprises: two first power lines spaced apart from each other; aplurality of connecting electrodes electrically connected to the twofirst power lines; and an insulating layer on the plurality ofconnecting electrodes, the insulating layer comprising a plurality ofopenings each of which exposing a respective one of the plurality ofconnecting electrodes, wherein the first light-emitting diode, thesecond light-emitting diode, and the third light-emitting diode arespaced apart from one another between the two first power lines, andwherein the second color area is smaller than each of the first colorarea and the third color area in size, and the second color area isdisposed between the first color area and the third color area.
 2. Thedisplay device of claim 1, wherein each of the first light-emittingdiode, the second light-emitting diode, and the third light-emittingdiode comprises a stack structure including a pixel electrode, anemission layer, and an opposite electrode, and wherein the firstlight-emitting diode, the second light-emitting diode, and the thirdlight-emitting diode share the opposite electrode.
 3. The display deviceof claim 2, wherein the emission layer comprises a hole within at leastone of the plurality of openings, and wherein the opposite electrode isin contact with a corresponding connecting electrode from among theplurality of connecting electrodes via the hole within the emissionlayer and at least one of the openings and is electrically connected toone of the two first power lines.
 4. The display device of claim 3,further comprising: at least one auxiliary line intersecting with thetwo first power lines, wherein the at least one auxiliary line iselectrically connected to at least one of the two first power lines. 5.The display device of claim 1, wherein the color panel comprises: alight-blocking layer defining the light-blocking area; a colorconversion-transmission layer comprising a plurality of color conversionportions configured to convert incident light into different colorlights and a transmission portion configured to transmit the incidentlight; and a color layer comprising a plurality of color filters, eachof the plurality of color filters overlapping a respective one of thetransmission portion and the plurality of color conversion portions. 6.The display device of claim 5, wherein the plurality of color conversionportions comprises quantum dots.
 7. The display device of claim 5,wherein the light-emitting panel further comprises a first electronicelement, a second electronic element, and a third electronic elementbetween the two first power lines, and wherein the light-blocking layercovers a first connection point between the first light-emitting diodeand the first electronic element, a second connection point between thesecond light-emitting diode and the second electronic element, and athird connection point between the third light-emitting diode and thethird electronic element.
 8. The display device of claim 7, wherein eachof the first electronic element, the second electronic element, and thethird electronic element comprises a storage capacitor.
 9. The displaydevice of claim 8, wherein the first electronic element, the secondelectronic element, and the third electronic element are arranged in onedirection, and wherein the second light-emitting diode overlaps thestorage capacitor of the first electronic element, the storage capacitorof the second electronic element, and the storage capacitor of the thirdelectronic element.
 10. The display device of claim 1, wherein a firstwidth between the first color area and the second color area issubstantially equal to a second width between the second color area andthe third color area.
 11. A display device comprising: two first powerlines extending in a first direction and spaced apart from each other ina second direction different from the first direction; a plurality ofconnecting electrodes overlapping the two first power lines; aninsulating layer disposed on the plurality of connecting electrodes, theinsulating layer comprising a plurality of openings respectivelyexposing the plurality of connecting electrodes; and a firstlight-emitting diode, a second light-emitting diode, and a thirdlight-emitting diode between the two first power lines, wherein thefirst light-emitting diode, the second light-emitting diode, and thethird light-emitting diode are spaced apart from one another between thetwo first power lines.
 12. The display device of claim 11, furthercomprising: an auxiliary line extending in a direction intersecting withthe two first power lines, the auxiliary line being electricallyconnected to at least one of the two first power lines.
 13. The displaydevice of claim 11, wherein each of the first light-emitting diode, thesecond light-emitting diode, and the third light-emitting diodecomprises a stack structure including a pixel electrode, an emissionlayer, and an opposite electrode, and wherein the first light-emittingdiode, the second light-emitting diode, and the third light-emittingdiode share the opposite electrode.
 14. The display device of claim 13,wherein the emission layer comprises a hole within at least one of theplurality of openings, and wherein the opposite electrode is in contactwith a corresponding connecting electrode from among the plurality ofconnecting electrodes via the hole within the emission layer and atleast one of the openings and is electrically connected to one of thetwo first power lines.
 15. The display device of claim 14, wherein thefirst light-emitting diode, the second light-emitting diode, and thethird light-emitting diode share the emission layer.
 16. The displaydevice of claim 11, further comprising: a first electronic element, asecond electronic element, and a third electronic element between thetwo first power lines, wherein the first electronic element, the secondelectronic element, and the third electronic element are arranged in thefirst direction.
 17. The display device of claim 16, wherein the firstlight-emitting diode is connected to the first electronic element, thesecond light-emitting diode is connected to the second electronicelement, and the third light-emitting diode is connected to the thirdelectronic element.
 18. The display device of claim 16, wherein a pixelelectrode in one of the first light-emitting diode, the secondlight-emitting diode, and the third light-emitting diode overlaps aportion of the first electronic element, a portion of the secondelectronic element, and a portion of the third electronic element. 19.The display device of claim 18, wherein the pixel electrode in one ofthe first to third light-emitting diodes has a first length in the firstdirection, and wherein the first length is less than a length of a pixelelectrode in another one of the first to third light-emitting diode. 20.The display device of claim 11, further comprising: a first color area,a second color area, and a third color area respectively overlapping thefirst light-emitting diode, the second light-emitting diode, and thethird light-emitting diode; and a color panel comprising alight-blocking area surrounding the first color area, the second colorarea, and the third color area.